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1986-1987 Buick Turbo Regal - CATALYTIC CONVERTER TEST PIPE & 4-BOLT FLANGE GASKET This is a stainless steel replacement pipe to eliminate the catalytic converter for off road use only. It is a bolt in replacement complete with the proper 1/2" thick 4-bolt flange at the one end. Overall length is 18" and the 4-bolt flange is almost 1/2" thick for support. The inlet diameter is 2-1/2" wide. The end result is a free flowing exhaust for "Off Road Use Only." You must have a stock length downpipe for this to fit properly. Each test pipe comes with a specially made gasket for the 4-bolt flange end.
1986-1987 Buick Turbo Regal - CATALYTIC CONVERTER TEST PIPE & 4-BOLT FLANGE GASKET This is a stainless steel replacement pipe to eliminate the catalytic converter for off road use only. It is a bolt in replacement complete with the proper 1/2" thick 4-bolt flange at the one end. Overall length is 18" and the 4-bolt flange is almost 1/2" thick for support. The inlet diameter is 2-1/2" wide. The end result is a free flowing exhaust for "Off Road Use Only." You must have a stock length downpipe for this to fit properly. Each test pipe comes with a specially made gasket for the 4-bolt flange end.
